Pop's Prop

**Minnerman** · 06-21-2011, 05:27 PM

Try this ES. Get pops to run the boat down the lake while you're layin on the back deck. At wide open throttle stick yo arm in the water as deep as you can reach. Feel the amount of force it puts on yo arm. Then pull yo arm up about an inch at a time and see if the resistance slowly goes away. It's the same principle as yo motor.

You may wanna consider installin a whale tail on it. I had to on mine. It will keep the prop from blowin out and keep the boat on plane. Ifn you do get one, get the aluminum one, not the thick plastic one.

**Rees Guide** · 06-21-2011, 05:31 PM

Yep, gotta to agree that this is the place to start.

try raising the motor on the jackplate

**TUSHHOG** · 06-21-2011, 07:23 PM

Ifen u rase it up and u ain't got no water pressure gauge, you'll be saying O Shxx!!!

Right after you smoke your Pop's engine. But what do I know.

You can't wear but one T- shirt at a time!!!

**Rees Guide** · 06-21-2011, 07:31 PM

If ya raise it up and it's still peeing it will be fine and that boy wears 2 or 3 t-shirts at a time!!!

**TUSHHOG** · 06-21-2011, 08:09 PM

He is fixin to get a foot up his a$$. It might pee idoling-a-long---but at WOT. That's wide open throttle, by the time you look back to see if its pissing water it may be to late,
it's take's maybe 15 seconds to cook the engine!!! Again what do I know???
If you going to jack with the jackplate install a water pressure gauge!!!!!!!!
P.S.
Is the engine hitting on all cylinders, if it's not, it might run good at top end but it will be hard to get on a plane.

**TUSHHOG** · 06-21-2011, 08:40 PM

Originally Posted by "G"

Wannabe is right ES....as wide as your boat is you need less pitch.......but your turning 5800 now and less pitch is going to bring those rpms up a little higher so you need to see what Mariner reccomendations are for the max rpm's on your motor. .......I have a feeling that a 19 will do the job for ya. Still best to.... Check with a boat shop or prop shop and see if they do not agree

Hey G , less pitch put's more load on the engine,more load=less RPM's.

**Rees Guide** · 06-21-2011, 08:53 PM

Originally Posted by TUSHHOG

He is fixin to get a foot up his a$$. It might pee idoling-a-long---but at WOT. That's wide open throttle, by the time you look back to see if its pissing water it may be to late,
it's take's maybe 15 seconds to cook the engine!!! Again what do I know???
If you going to jack with the jackplate install a water pressure gauge!!!!!!!!
P.S.
Is the engine hitting on all cylinders, if it's not, it might run good at top end but it will be hard to get on a plane.

As long as the fins on the side of the foot above the prop aren't above the bottom of the boat he shouldnt have a prob. Pressure gauge is a good idea for sure but a boat not getting on plane and lugging the whole time will overheat as well. Sounds like it's under powered.
None of us seeing it first hand aint helping either.
Good luck ES.

**EmptyStringer** · 06-21-2011, 09:02 PM

115 Mariner 4 cylinder. One of those that runs on two cylinders til you punch it. It definately has enough power

**TUSHHOG** · 06-21-2011, 09:08 PM

First hand is more than a plus, it's a must. Just got to by what he see's. Hate to see the boy mess-up.

**TUSHHOG** · 06-22-2011, 06:02 AM

looked this up this AM. not sure if it's yours. If it is your RPM's at WOT are 4750-5250...too much prop.

http://www.marinepartsman.com/Mercur...1988/EN_18.PDF

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